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Nowadays, number of mechanisms are available to carry heavy objects on the staircase for normal working operations. However, these mechanisms are facing a common problem of slippage while moving onto the staircase. This research work proposes a design of stair climbing trolley with an automatic anti-slippage mechanism to overcome the aforementioned problem. In this design, a four-arm wheel mechanism with braking pins was proposed that restrict the individual movement of wheels while climbing the stairs. These braking pins are attached with rack and pinion arrangement and operated by a motor installed in the control unit. Two proximity sensors were also installed on the control unit, which generally detect the staircase in the path and turn on the DC motor to apply brakes to all the wheels. Through this mechanism, while carrying the heavy objects on the stairs/staircase, slippage chances can be avoided. During the normal shifting, this braking system is released and one can transfer the material on the normal surface, like a normal operational trolley. |
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